Massdrop Sennheiser 579

Anyone familiar with these?

www.massdrop.com/buy/sennheiser-hd-579-headphones?1=1&utm_placement=0&referer=2K3ZGS&mode=guest_open&utm_campaign=Automated%20Daily%20Promotional%202017-09-18&utm_source=SparkPost&utm_medium=email&utm_term=Daily%20Promotional&utm_content=1505739317123.012880342158757388168202

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